Radial electric field driven by vertical neutral beamlet injection under future fusion reactor conditions
The fast ions and electrons generated by neutral beam injection (NBI) can induce charge separation, resulting in radial electric fields. Employing beamlet injection of small cross-section may effectively generate radial electric field, and adjusting beamlet parameters allows active control over thei...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | Nuclear Fusion |
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| Online Access: | https://doi.org/10.1088/1741-4326/ad85f2 |
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| author | Xingyuan Xu Yingfeng Xu Xiaodong Zhang Xiaotao Xiao |
| author_facet | Xingyuan Xu Yingfeng Xu Xiaodong Zhang Xiaotao Xiao |
| author_sort | Xingyuan Xu |
| collection | DOAJ |
| description | The fast ions and electrons generated by neutral beam injection (NBI) can induce charge separation, resulting in radial electric fields. Employing beamlet injection of small cross-section may effectively generate radial electric field, and adjusting beamlet parameters allows active control over their distribution. A new NBI injection geometry system has been developed in the NEOE code to explore the potential for vertical beamlets injection in future fusion reactor scenarios. Both high-field side and low-field side beamlet vertical injections can establish radial electric fields. In scenarios dominated by collision effects, the direction of the radial electric field is influenced by the toroidal angle of the beamlet. Adjusting the poloidal angle can alter the location of the electric field shear. Injecting particles into the trapped region using broader banana orbits can establish electric fields within the plasma core. Alternatively, injecting particles into the passing region can yield higher electric fields. Under future reactor conditions, conservative estimates of the electric field shear may even surpass critical velocities, potentially contributing to instability suppression. |
| format | Article |
| id | doaj-art-3c8809f401b04c9d89191c5df0afe24c |
| institution | OA Journals |
| issn | 0029-5515 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nuclear Fusion |
| spelling | doaj-art-3c8809f401b04c9d89191c5df0afe24c2025-08-20T01:48:07ZengIOP PublishingNuclear Fusion0029-55152024-01-01641212605310.1088/1741-4326/ad85f2Radial electric field driven by vertical neutral beamlet injection under future fusion reactor conditionsXingyuan Xu0https://orcid.org/0000-0001-6674-1811Yingfeng Xu1https://orcid.org/0000-0003-2960-9488Xiaodong Zhang2Xiaotao Xiao3Institute of Plasma Physics , Chinese Academy of Sciences, Hefei 230031, ChinaCollege of Physics, Donghua University , Shanghai 201620, China; Member of Magnetic Confinement Fusion Research Centre, Ministry of Education, Donghua University , Shanghai 201620, ChinaInstitute of Plasma Physics , Chinese Academy of Sciences, Hefei 230031, ChinaInstitute of Plasma Physics , Chinese Academy of Sciences, Hefei 230031, ChinaThe fast ions and electrons generated by neutral beam injection (NBI) can induce charge separation, resulting in radial electric fields. Employing beamlet injection of small cross-section may effectively generate radial electric field, and adjusting beamlet parameters allows active control over their distribution. A new NBI injection geometry system has been developed in the NEOE code to explore the potential for vertical beamlets injection in future fusion reactor scenarios. Both high-field side and low-field side beamlet vertical injections can establish radial electric fields. In scenarios dominated by collision effects, the direction of the radial electric field is influenced by the toroidal angle of the beamlet. Adjusting the poloidal angle can alter the location of the electric field shear. Injecting particles into the trapped region using broader banana orbits can establish electric fields within the plasma core. Alternatively, injecting particles into the passing region can yield higher electric fields. Under future reactor conditions, conservative estimates of the electric field shear may even surpass critical velocities, potentially contributing to instability suppression.https://doi.org/10.1088/1741-4326/ad85f2neutral beamletradial electric fieldcollision effectscritical sound speed |
| spellingShingle | Xingyuan Xu Yingfeng Xu Xiaodong Zhang Xiaotao Xiao Radial electric field driven by vertical neutral beamlet injection under future fusion reactor conditions Nuclear Fusion neutral beamlet radial electric field collision effects critical sound speed |
| title | Radial electric field driven by vertical neutral beamlet injection under future fusion reactor conditions |
| title_full | Radial electric field driven by vertical neutral beamlet injection under future fusion reactor conditions |
| title_fullStr | Radial electric field driven by vertical neutral beamlet injection under future fusion reactor conditions |
| title_full_unstemmed | Radial electric field driven by vertical neutral beamlet injection under future fusion reactor conditions |
| title_short | Radial electric field driven by vertical neutral beamlet injection under future fusion reactor conditions |
| title_sort | radial electric field driven by vertical neutral beamlet injection under future fusion reactor conditions |
| topic | neutral beamlet radial electric field collision effects critical sound speed |
| url | https://doi.org/10.1088/1741-4326/ad85f2 |
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